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Tekton Double Impact & Comb Filtering

Like many of you, I have been pondering purchasing these speakers but am very curious about the unusual tweeter array. I asked the smartest speaker person that I know (he is a student of Sean Olive) about the design and below is what he had to say.   

"In theory it could work, but the driver spacing means that the crossover point would need to be very low.
He is using the SB acoustics tweeter which is 72mm in diameter, center to center on the outside opposing drivers is around 5.7 inches, which is about 2400Hz. This means that combing would stop between 1/4 to 1/2 of the wavelength (between 1200-600Hz) is where the outside tweeters should start playing nice with each other.
Since he is not using low enough crossover points he has created a comb filtering monster. Now while it's not the great point source that was promised, it's no worse than most line arrays and the combing will average itself out given enough listening distance.

The MTM spacing on the other hand is ridiculous. Hopefully he is cutting the top end off on one of those midrange drivers to avoid combing."

seanheis1
213runnin
914 posts
 
Oh, now you're all friendly again.  Just what is your deal, James?  You go from trying to shame me for the lowly gear I own to, "hey, thanks for linking my thread".  You're kind of a jerk, James, I don't think I'd ever want to have any dealings with you on Canuckaudiomart.  

And in this thread, I'm going to discuss Tekton's faults with posters like Sean.  You're going to have to deal with it.
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213runnin
914 posts
 
Sean, sorry about this odd little diatribe. What a strange conversation. I’ll just ignore such foolishness in the future, hopefully such petty personal attacks are refrained from.

I think you’e right, indeed Tekton doesn’t mention anything about any coaxial effect. In fact, on some of their speakers, they use full range drivers with whizzer cones.
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